This medium dog harness fits narrow body dogs with a deep rib cage. The soft reflective chest strap, flexible saddle, and ultra soft webbed girth keep the dog's range of motion flexible while the reflective outline keeps them visible. Thus, making it a great athletic dog harness for nose work, disc dog, flyball or any other canine sport that you and your pup may be involved in. Have fun with the coolest medium-sized dog harness in or out of town.